201031220001121 has 4 divisors (see below), whose sum is σ = 201047052983812. Its totient is φ = 201015387018432.

The previous prime is 201031220001077. The next prime is 201031220001137. The reversal of 201031220001121 is 121100022130102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 32780617390096 + 168250602611025 = 5725436^2 + 12971145^2 .

It is a cyclic number.

It is not a de Polignac number, because 201031220001121 - 2¹⁷ = 201031219870049 is a prime.

It is a super-2 number, since 2×201031220001121² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201031220001095 and 201031220001104.

It is not an unprimeable number, because it can be changed into a prime (201031220008121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7916472300 + ... + 7916497693.

It is an arithmetic number, because the mean of its divisors is an integer number (50261763245953).

Almost surely, 2^{201031220001121} is an apocalyptic number.

It is an amenable number.

201031220001121 is a deficient number, since it is larger than the sum of its proper divisors (15832982691).

201031220001121 is a wasteful number, since it uses less digits than its factorization.

201031220001121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15832982690.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 201031220001121 its reverse (121100022130102), we get a palindrome (322131242131223).

The spelling of 201031220001121 in words is "two hundred one trillion, thirty-one billion, two hundred twenty million, one thousand, one hundred twenty-one".